CN112664452B

CN112664452B - Compressor

Info

Publication number: CN112664452B
Application number: CN202011518262.9A
Authority: CN
Inventors: 赵豪川; 徐嘉; 方琪; 刘双来
Original assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Current assignee: Gree Green Refrigeration Technology Center Co Ltd of Zhuhai
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2022-08-23
Anticipated expiration: 2040-12-21
Also published as: CN112664452A

Abstract

The invention provides a compressor, which comprises a crankshaft, wherein a first axial end of the crankshaft is connected with a pump body assembly, a second axial end of the crankshaft is connected with a driving motor assembly, the driving motor assembly comprises a motor rotor sleeved on the crankshaft and a motor stator connected to the inner wall of a shell, the crankshaft is provided with a thrust plate, a thrust bearing is arranged between the thrust plate and a first axial end face of the motor stator, and the thrust bearing can prevent axial movement between the motor rotor and the motor stator. According to the invention, the deformation degree of the crankshaft during operation can be effectively reduced, so that the operation stability of the compressor is improved, a structure for supporting by independently arranging a bracket in the prior art is not needed, the number of parts is reduced, the cost is reduced, and meanwhile, the assembly efficiency is improved.

Description

Compressor

Technical Field

The invention belongs to the technical field of compressor manufacturing, and particularly relates to a compressor.

Background

The shafting is as rotary part, because movable needs arrange in on certain part for the shafting is whole can steady rotation, traditional shafting thrust mode is top thrust or lower thrust, so-called top thrust is that the shafting is arranged in on the upper bracket, the upper bracket supports whole shafting, the bent axle is connected with the upper bracket with footstep bearing, lower thrust sets up the thrust plate on the lower bracket, the whole friction pair that forms with the thrust plate of shafting, because upper bracket and lower bracket are in the length both ends of bent axle respectively, make the major-minor journal support far away from the rotor, lead to the bent axle to warp great, the compressor operation is not steady.

Disclosure of Invention

Therefore, the invention provides a compressor to overcome the defects that the crankshaft is greatly deformed and the compressor runs unstably because the crankshaft is supported at two ends of the length of the crankshaft and is far away from a motor rotor in the prior art.

In order to solve the problems, the invention provides a compressor, which comprises a crankshaft, wherein a first axial end of the crankshaft is connected with a pump body assembly, a second axial end of the crankshaft is connected with a driving motor assembly, the driving motor assembly comprises a motor rotor sleeved on the crankshaft and a motor stator connected to the inner wall of a shell, the crankshaft is provided with a thrust plate, a thrust bearing is arranged between the thrust plate and a first axial end face of the motor stator, and the thrust bearing can prevent axial movement between the motor rotor and the motor stator.

Preferably, the thrust bearing comprises a plate body and a lubricating layer arranged on one side of the plate body, the plate body is attached to the first axial end face of the motor stator, and the thrust plate is connected with the lubricating layer in a contacting mode.

Preferably, the lubricating layer is made of a self-lubricating material.

Preferably, the self-lubricating material comprises sintered copper.

Preferably, a plurality of oil storage grooves are formed on the lubricating layer; and/or one side of the plate body is provided with a retaining ring wall, and the retaining ring wall extends along one side far away from the axial first end surface of the motor stator.

Preferably, the outer peripheral wall of the retainer ring wall has an insulating layer.

Preferably, the thrust plate is connected to a first axial end face of the motor rotor, a radial outer edge of the thrust plate protrudes out of an outer peripheral surface of the motor rotor, and the first axial end face of the motor rotor corresponds to a first axial end face of the motor stator.

Preferably, the axial second end face of the motor rotor is also connected with the thrust plate, and the thrust plate is in contact connection with the axial second end face of the motor stator to prevent axial play between the motor rotor and the motor stator.

Preferably, the thrust bearing is arranged between the thrust plate and the second axial end face of the motor stator.

Preferably, a support ring is arranged on the second axial end face of the motor stator, and one end, far away from the second axial end face of the motor stator, of the support ring is connected with the lower cover of the casing.

According to the compressor provided by the invention, the thrust plate and the end face of the motor stator realize rotary support of one axial end of the crankshaft through the thrust bearing, and the distance between two end supports (namely main and auxiliary shaft diameter supports) of the crankshaft is shortened, so that the deformation degree of the crankshaft during operation can be effectively reduced, and the operation stability of the compressor is improved.

Drawings

Fig. 1 is a schematic view (partial structure) of an internal structure of a compressor according to an embodiment of the present invention;

FIG. 2 is a schematic structural view (in section) of the thrust bearing of FIG. 1;

FIG. 3 is a top view of FIG. 2;

fig. 4 is a schematic structural view of the thrust plate in fig. 1.

The reference numerals are represented as:

1. a crankshaft; 3. a drive motor assembly; 31. a motor rotor; 311. a thrust plate; 32. a motor stator; 33. a thrust bearing; 331. a plate body; 332. a lubricating layer; 333. an oil storage tank; 334. a retaining ring wall; 4. a housing; 5. a support ring; 61. an upper bracket; 62. an upper balance block; 63. a lower balance weight.

Detailed Description

Referring to fig. 1 to 4 in combination, according to an embodiment of the present invention, there is provided a compressor, including a crankshaft 1, a pump body assembly (not shown in the figure) is connected to a first axial end of the crankshaft 1, a driving motor assembly 3 is connected to a second axial end of the crankshaft 1, the driving motor assembly 3 comprises a motor rotor 31 sleeved on the crankshaft 1 and a motor stator 32 connected to the inner wall of the machine shell 4, the crankshaft 1 is provided with a thrust plate 311 (here, the thrust plate 311 may be directly connected to the crankshaft 1, or may be indirectly connected to the crankshaft 1, for example, by switching through the motor rotor 31), a thrust bearing 33 is provided between the thrust plate 311 and the first axial end face of the motor stator 32, the thrust bearing 33 can prevent axial play between the motor rotor 31 and the motor stator 32. In the technical scheme, the thrust plate 311 and the end face of the motor stator 32 are rotatably supported at one axial end of the crankshaft 1 through the thrust bearing 33, and the distance between the supports at the two ends of the crankshaft 1 (namely, the main and auxiliary shaft diameter supports) is shortened, so that the deformation degree of the crankshaft 1 during operation can be effectively reduced, the operation stability of the compressor is improved (the noise of the compressor can be reduced), and meanwhile, the technical scheme of the invention does not need a structure in which a support is independently arranged for supporting in the prior art, reduces the number of parts, reduces the cost and improves the assembly efficiency.

In addition, the thrust bearing 33 of the invention is positioned between the driving motor component 3 and the pump body component, and the exhaust of the pump body component is guided to cool the driving motor component 3, so that the thrust bearing 33 can be fully lubricated, the lubrication state is better, the bearing cooling effect is greatly improved, the bearing operating environment is good, and the reliability of the whole machine is good.

The specific structure of the pump body assembly depends on the specific type of the compressor, for example, when the compressor is a scroll compressor, the pump body assembly correspondingly includes an orbiting scroll, a fixed scroll, an upper bracket 61 (shown in fig. 1) connected to one end of the crankshaft 1 in the axial direction, and the like, and when the compressor is a rotary compressor, the pump body assembly correspondingly includes a roller, a cylinder, a vane, upper and lower flanges, and the like. It will be appreciated that an upper counterweight 62 or a lower counterweight 63 may also be provided at different axial positions of the crankshaft 1 in order to improve the rotational dynamic balance of the crankshaft 1.

Preferably, the driving motor assembly 3 is located at the bottom side of the casing 4, that is, the pump body assembly is located at the upper part of the driving motor assembly 3, so that the driving motor assembly 3 is located at the bottom oil pool side of the casing 4, and sufficient lubrication can be ensured.

As a specific structural form of the thrust bearing 33, preferably, the thrust bearing 33 includes a plate body 331 and a lubricating layer 332 disposed on one side of the plate body 331, the plate body 331 is attached to the first axial end surface of the motor stator 32, and the thrust plate 311 is in contact connection with the lubricating layer 332. Specifically, the lubricating layer 332 is made of a self-lubricating material such as sintered copper.

Further, a plurality of oil reservoirs 333 are formed in the lubricating layer 332 to store lubricating oil, so that an oil film can be formed between the lubricating layer 332 and the thrust plate 311, and friction force between the two and wear on the lubricating layer 332 are reduced; preferably, one side of the plate body 331 is provided with a retaining ring wall 334, the retaining ring wall 334 extends along one side far away from the axial first end face of the motor stator 32 to isolate the winding on the axial first end face of the motor stator 32 and prevent damage caused by contact friction between the winding and the thrust plate 311, and the peripheral wall of the retaining ring wall 334 is provided with an insulating layer, for example, PTFE (polytetrafluoroethylene).

As a specific implementation manner, the thrust plate 311 is connected to the first axial end surface of the motor rotor 31, that is, in an objective view, the thrust plate 311 serves as an end baffle of the motor rotor 31 to achieve axial stopping of magnetic steel in the motor rotor 31, a radial outer edge of the thrust plate 311 protrudes out of an outer peripheral surface of the motor rotor 31, and the first axial end surface of the motor rotor 31 corresponds to the first axial end surface of the motor stator 32, so that the structure inside the compressor is more simplified and reasonable. Preferably, the thrust plate 311 is also connected to the second axial end face of the motor rotor 31, and the thrust plate 311 is in contact connection with the second axial end face of the motor stator 32 to prevent axial play between the motor rotor 31 and the motor stator 32.

It is understood that the thrust bearing 33 is disposed between the thrust plate 311 and the second axial end face of the motor stator 32.

In some embodiments, the axial second end face of the motor stator 32 is provided with a support ring 5, one end of the support ring 5, which is far away from the axial second end face of the motor stator 32, is connected to the lower cover of the casing 4, and of course, the axial first end face of the motor stator 32 may also be provided with the support ring 5, so as to position the axial position of the motor stator 32 and prevent the axial float of the motor stator 32 under the action of the axial force of the crankshaft 1 from causing the falling-off of the motor stator 32. In particular, a corresponding annular groove is formed on the first axial end face and/or the second axial end face of the motor stator 32, in which the support ring 5 is installed in an interference manner (e.g., shrink fit).

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. The compressor is characterized by comprising a crankshaft (1), wherein a pump body assembly is connected to a first axial end of the crankshaft (1), a driving motor assembly (3) is connected to a second axial end of the crankshaft (1), the driving motor assembly (3) comprises a motor rotor (31) sleeved on the crankshaft (1) and a motor stator (32) connected to the inner wall of a shell (4), a thrust plate (311) is arranged on the crankshaft (1), a thrust bearing (33) is arranged between the thrust plate (311) and a first axial end face of the motor stator (32), and the thrust bearing (33) can prevent axial movement between the motor rotor (31) and the motor stator (32); the thrust bearing (33) comprises a plate body (331) and a lubricating layer (332) arranged on one side of the plate body (331), the plate body (331) is attached to the axial first end face of the motor stator (32), and the thrust plate (311) is in contact connection with the lubricating layer (332); one side of plate body (331) has retaining ring wall (334), retaining ring wall (334) is along keeping away from one side of the first terminal surface of the axial of motor stator (32) extends, the periphery wall of retaining ring wall (334) has the insulating layer.

2. The compressor of claim 1, wherein the lubricating layer (332) is made of a self-lubricating material.

3. The compressor of claim 2, wherein the self-lubricating material comprises sintered copper.

4. Compressor according to claim 1, characterized in that a plurality of oil reservoirs (333) are configured on the lubricating layer (332).

5. The compressor of claim 1, wherein the thrust plate (311) is connected to a first axial end surface of the motor rotor (31), a radially outer edge of the thrust plate (311) protrudes from an outer circumferential surface of the motor rotor (31), and the first axial end surface of the motor rotor (31) corresponds to a first axial end surface of the motor stator (32).

6. The compressor of claim 5, wherein the thrust plate (311) is also connected to the second axial end face of the motor rotor (31), and the thrust plate (311) is connected in contact with the second axial end face of the motor stator (32) to prevent axial play between the motor rotor (31) and the motor stator (32).

7. Compressor according to claim 6, characterized in that the thrust bearing (33) is arranged between the thrust plate (311) and the second axial end face of the motor stator (32).

8. Compressor according to claim 1, characterized in that the second axial end face of the motor stator (32) is provided with a support ring (5), and one end of the support ring (5) remote from the second axial end face of the motor stator (32) is connected with the lower cover of the casing (4).